I built this based off the highline guitars YouTube video. The 2x4 was splitting way too much and the threaded inserts were soft and junk, I’m looking to build another one. I want to use either a 80/20 aluminum t slot and look for attachments or a 2x4 or even a 4x4 that is planed and jointed. I showed a machinist I use to work with but he said he’d charge too much and I’d be better off buying a premade neck jig. So I talked him into helping me drill the holes when I got the parts. Anyone go the 80/20 route? What attachments did you get? I’m mainly aiming towards having a workstation that makes it easier to work at different heights, waist and elbow and eventually adapts to different guitar bodies. I like how the neck is supported well. Plus rocking a neatly built neck jig will look good when I have bands check out my tools. I haven’t tried the string tension methods yet.